Nut mounting device

Abstract

The utility model relates to the technical field of mechanical equipment assembly, and discloses a nut mounting device which comprises a nut rotating device and a nut transmission structure. The nut transmission structure comprises a nut rotating column, and a nut connecting structure used for being connected with a nut is arranged on the nut rotating column. The nut rotating device comprises a machine base, a nut rotating driving device and a nut rotating wheel, the nut rotating driving device is arranged on the machine base, the nut rotating driving device is in transmission connection with the nut rotating wheel, the nut rotating wheel is arranged on the nut rotating column in a pressing mode, and the nut rotating wheel is used for driving the nut rotating column to rotate so as to drive the nut to rotate. The device has the beneficial effects that the mode of manually driving the nut can be replaced, the nut rotates faster during installation, the installation time is shorter, the installation efficiency is improved, the burden of workers is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment assembly, in particular to a nut installation device. Background Art

[0002] In a modern production environment, the production of large workpieces requires corresponding large equipment to complete. The parts that make up large equipment are usually also relatively large in weight and volume. For example, some large equipment is equipped with large studs, and large nuts need to be installed on them during assembly. The weight and volume of the nuts are relatively large, and it is time-consuming and laborious for the staff to twist them. Large equipment such as hydraulic presses, the nuts used to assemble hydraulic presses, generally have an aperture of more than 150mm and a weight of more than 28kg. Such nuts are large in volume and weight, and it is also difficult to install the nuts. If the gap between the stud and the nut is small, the nut is easy to get stuck during the screwing process, which further increases the difficulty of installing the nut. The existing nut installation method makes the nut installation efficiency low, and the workload of the staff is also high, which is not conducive to improving production efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a nut installation device, aiming to solve the technical problems of difficulty in installing large nuts and low installation efficiency in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model proposes a nut installation device, including a nut rotating device and a nut transmission structure; the nut transmission structure includes a nut rotating column, and the nut rotating column is provided with a nut connecting structure for connecting the nut; the nut rotating device includes a machine base, a nut rotating driving device and a nut rotating wheel, the nut rotating driving device is arranged on the machine base, the nut rotating driving device is connected to the nut rotating wheel in transmission, the nut rotating wheel is pressed on the nut rotating column, and the nut rotating wheel is used to drive the nut rotating column to rotate, so as to drive the nut to rotate.

[0005] The beneficial effects of the utility model are as follows: when installing the nut, the nut rotating column is fixedly connected to the nut through the nut connecting structure, and then the nut rotating wheel in the nut rotating device is pressed tightly against the nut rotating column, the nut rotating driving device is started, and the nut rotating wheel is driven to rotate, and the nut rotating wheel drives the nut rotating column to rotate through the action of friction, and then the nut rotating column drives the nut to rotate, so as to achieve the purpose of installing the nut on the stud. The nut installation device in the utility model can replace the method of manually driving the nut, so that the nut rotates faster during installation, the installation time is shorter, which is conducive to improving installation efficiency, reducing the burden on staff, and improving economic benefits.

[0006] Preferably, a limiting device is further provided on the machine base, and the limiting device is arranged around the circumference of the nut rotating column to limit the nut rotating column from moving along its own radial direction.

[0007] Preferably, the limiting device comprises a clamping drive device and a clamping arm assembly which are transmission-connected, the clamping arm assembly comprises at least two hingedly connected clamping arms, and the clamping drive device is used to drive the clamping arm assembly to close or open to clamp or loosen the nut rotating column.

[0008] Preferably, a clamping roller is rotatably connected to the clamping arm, and when the clamping arm assembly clamps the nut rotating column, the clamping roller is pressed against the outer peripheral wall of the nut rotating column.

[0009] Preferably, the clamping arm assembly includes a first clamping arm and a second clamping arm, the first clamping arm is fixedly connected to the machine base, the two ends of the second clamping arm are respectively a driving connection end and a clamping end, and the second clamping arm is also provided with a hinge position, the driving connection end, the hinge position and the clamping end are arranged along the extension direction of the second clamping arm, the clamping drive device includes a clamping drive cylinder, the piston rod of the clamping drive cylinder is connected to the driving connection end, and the first clamping arm is hinged at the hinge position of the second clamping arm.

[0010] Preferably, the first clamping arm comprises two first clamping arms arranged at intervals and a first arm connecting rod for connecting the two first clamping arms, the second clamping arm comprises two second clamping arms arranged at intervals and a second arm connecting rod for connecting the two second clamping arms, and the distance w between the two first clamping arms is 1 Greater than the distance w between the two second clamping arms 2 .

[0011] Preferably, the nut rotation driving device comprises a nut rotation driving motor, and the nut rotation wheel is arranged on the rotating shaft of the nut rotation driving motor.

[0012] Preferably, the nut rotating device is arranged at one end of the machine base, and the other end of the machine base is provided with a machine base gripping portion.

[0013] Preferably, the nut connecting structure includes at least two nut connecting rods arranged opposite to each other, the upper ends of the nut connecting rods are connected to the bottom of the nut rotating column, the lower ends of the nut connecting rods are provided with nut connecting plates, and the nut connecting plates are provided with nut connecting holes.

[0014] Preferably, the nut installation device also includes a nut installation auxiliary cylinder, the interior of the nut rotating column is hollow, the nut installation auxiliary cylinder is inserted into the nut rotating column, and a rotating bearing is provided between the outer circumferential wall of the nut installation auxiliary cylinder and the inner circumferential wall of the nut rotating column, so that the nut rotating column can rotate relative to the nut installation auxiliary cylinder; the piston rod of the nut installation auxiliary cylinder faces downward, and the lower end of the piston rod of the nut installation auxiliary cylinder is provided with a supporting part, which can pass through the nut and be supported on the stud. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a nut installation device, a nut and a stud in an embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the machine base, the nut rotating device, the limiting device and the nut rotating column in the embodiment of the utility model, and the state of the clamping arm assembly in the figure is to clamp the nut rotating column;

[0018] Figure 3 It is a schematic diagram of the structure of the machine base, the nut rotating device, the limiting device and the nut rotating column in the embodiment of the utility model, and the state of the clamping arm assembly in the figure is to loosen the nut rotating column;

[0019] Figure 4 It is a structural schematic diagram of the machine base, the nut rotating device and the limiting device in the embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the first clamping arm in an embodiment of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the second clamping arm in the embodiment of the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the first clamping arm and the second clamping arm in an embodiment of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the nut rotating column, the nut mounting auxiliary cylinder and the rotating bearing in the embodiment of the utility model;

[0024] Fig. 9 This is a structural schematic diagram of a nut installation auxiliary cylinder in an embodiment of the utility model;

[0025] Fig.10 It is a bottom view of the nut rotating structure in the embodiment of the utility model.

[0026] In the accompanying drawings: 1-machine base, 11-machine base gripping portion, 2-nut rotating device, 21-nut rotating wheel, 22-nut rotating driving device, 3-limiting device, 31-clamping driving device, 311-connecting groove, 32-clamping arm assembly, 321-clamping arm, 3211-first clamping arm, 32111-first clamping support arm, 32112-first support arm connecting rod, 3212-second clamping arm, 32121-second clamping support arm, 32122-second support arm connecting rod Connecting rod, 32123-driving connection end, 32124-hinge position, 32125-clamping end, 322-straight arm portion, 323-curved arm portion, 33-clamping roller, 4-nut transmission structure, 41-nut rotating column, 42-nut connecting rod, 421-nut connecting plate, 4211-nut connecting hole, 43-annular connecting plate, 44-nut connecting structure, 5-nut installation auxiliary cylinder, 51-support portion, 6-rotating bearing, 10-nut, 20-stud.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0031] like Figures 1 to 10As shown, a nut installation device includes a nut rotating device 2 and a nut transmission structure 4; the nut transmission structure 4 includes a nut rotating column 41, and the nut rotating column 41 is provided with a nut connecting structure 44 for connecting the nut 10; the nut rotating device 2 includes a machine base 1, a nut rotating driving device 22 and a nut rotating wheel 21, the nut rotating driving device 22 is arranged on the machine base 1, the nut rotating driving device 22 is transmission-connected with the nut rotating wheel 21, the nut rotating wheel 21 is pressed on the nut rotating column 41, and the nut rotating wheel 21 is used to drive the nut rotating column 41 to rotate, so as to drive the nut 10 to rotate.

[0032] When installing the nut 10, the nut rotating column 41 is fixedly connected to the nut 10 through the nut 10 connection structure, and then the nut rotating wheel 21 in the nut rotating device 2 is pressed against the nut rotating column 41, and the nut rotating driving device 22 is started to drive the nut rotating wheel 21 to rotate. The nut rotating wheel 21 drives the nut rotating column 41 to rotate through the friction force, and then the nut rotating column 41 drives the nut 10 to rotate, so as to achieve the purpose of installing the nut 10 on the stud 20. The nut installation device in the utility model can replace the method of driving the nut 10 manually, so that the nut 10 rotates faster during installation, the installation time is shorter, which is conducive to improving installation efficiency, reducing the burden on staff, and improving economic benefits.

[0033] In some specific embodiments, reference Figures 1 to 3 A limiting device 3 is also provided on the base 1. The limiting device 3 is arranged around the circumference of the nut rotating column 41 to limit the nut rotating column 41 from moving in its own radial direction.

[0034] When the nut rotating wheel 21 drives the nut rotating column 41 to rotate, the nut rotating column 41 may move along its own radial direction, causing position deviation and separation from the nut rotating wheel 21, so that the nut rotating column 41 cannot continue to rotate. The limiting device 3 is provided to limit the range of movement of the nut rotating column 41, reduce the possibility of the above situation, and ensure installation efficiency and quality.

[0035] In some specific embodiments, reference Figure 2 and Figure 3 The limiting device 3 includes a clamping drive device 31 and a clamping arm assembly 32 which are transmission-connected. The clamping arm assembly 32 includes at least two hinged clamping arms 321. The clamping drive device 31 is used to drive the clamping arm assembly 32 to close or open so as to clamp or loosen the nut rotating column 41.

[0036] In some specific embodiments, reference Figures 2 to 7 The clamping arm 321 is rotatably connected with a clamping roller 33 . When the clamping arm assembly 32 clamps the nut rotating column 41 , the clamping roller 33 is pressed against the outer peripheral wall of the nut rotating column 41 .

[0037] A clamping roller 33 is provided on the clamping arm 321, and the clamping roller 33 directly contacts the nut rotating column 41, so that the clamping force of the clamping arm assembly 32 directly acts on the nut rotating column 41, further strengthening the limiting effect on the nut rotating column 41. At the same time, the nut rotating wheel 21 drives the nut rotating column 41 to rotate, and the nut rotating column 41 also drives the clamping roller 33 to rotate, so that the nut rotating column 41 can rotate smoothly, ensuring the quality and efficiency of the installation of the nut 10.

[0038] In some specific embodiments, reference Figure 2 , Figure 3 ,and Figure 6 The clamping arm assembly 32 includes a first clamping arm 3211 and a second clamping arm 3212. The first clamping arm 3211 is fixedly connected to the machine base 1. The two ends of the second clamping arm 3212 are respectively a driving connection end 32123 and a clamping end 32125. The second clamping arm 3212 is also provided with a hinge position 32124. The driving connection end 32123, the hinge position 32124 and the clamping end 32125 are arranged along the extension direction of the second clamping arm 3212. The clamping drive device 31 includes a clamping drive cylinder. The piston rod of the clamping drive cylinder is connected to the driving connection end 32123. The first clamping arm 3211 is hinged to the hinge position 32124 of the second clamping arm 3212.

[0039] Specifically, a connecting groove 311 is provided on the piston rod of the clamping driving cylinder, and the end of the second clamping arm 3212 at least partially extends into the connecting groove 311 and is hingedly connected to the groove body of the connecting groove 311, so that the second clamping arm 3212 can rotate relative to the piston rod of the clamping driving cylinder. A hinge hole is provided on the hinge position 32124 of the second clamping arm 3212, and a hinge bar is provided at a position corresponding to the hinge hole on the first clamping arm 3211, and the hinge bar passes through the hinge hole to realize the hinge connection between the first clamping arm 3211 and the second clamping arm 3212, so that the second clamping arm 3212 can rotate relative to the first clamping arm 3211.

[0040] When the nut rotating column 41 is limited, the first clamping arm 3211 and the second clamping arm 3212 are placed on both sides of the nut rotating column 41, the piston rod of the clamping driving cylinder is extended, and the clamping end 32125 of the second clamping arm 3212 is close to the clamping end 32125 of the first clamping arm 3211 to close the clamping arm assembly 32 until the clamping rollers 33 on the two clamping arms 321 are pressed onto the outer peripheral wall of the nut rotating column 41; when the nut rotating column 41 needs to be loosened, the piston rod of the clamping driving cylinder is retracted, and the clamping end 32125 of the second clamping arm 3212 is away from the clamping end 32125 of the first clamping arm 3211 to open the clamping arm assembly 32 until the nut rotating column 41 can pass through the clamping ends 32125 of the two clamping arms 321 and remove the limiting device 3.

[0041] The limiting component is arranged in the form of being clamped by the clamping arm component 32, so that the limiting effect can be improved, and at the same time, the outer diameters of different nut rotating columns 41 can be matched, thereby expanding the application scope of the limiting component.

[0042] In some specific embodiments, reference Figure 1 , Figure 4 and Figure 7 The first clamping arm 3211 includes two first clamping arms 32111 disposed at intervals and a first arm connecting rod 32112 for connecting the two first clamping arms 32111. The second clamping arm 3212 includes two second clamping arms 32121 disposed at intervals and a second arm connecting rod 32122 for connecting the two second clamping arms 32121. The distance w between the two first clamping arms 32111 is 1 Greater than the distance w between the two second clamping arms 32121 2 .

[0043] Specifically, the second support arm connecting rod 32122 is disposed on the clamping end 32125 of the second clamping arm 3212, and the clamping roller 33 is rotatably connected to the second support arm connecting rod 32122. The distance w between the two second clamping arms 32121 is 2 Only the clamping roller 33 can be accommodated and installed. The hinged end of one of the second clamping arms 32121 is arranged in the above-mentioned connecting groove 311.

[0044] The first support arm connecting rod 32112 is disposed on the clamping end 32125 of the first clamping arm 3211, and the clamping roller 33 is rotatably connected to the first support arm connecting rod 32112. 1 Greater than w 2 , for example 1 =50mm, w 2 =10mm, even if the nut rotating column 41 tilts during the rotation process, when it contacts one of the first clamping arms 32111, its posture can be corrected, which is conducive to making the clamping more stable.

[0045] The first clamping arm 32111 and the second clamping arm 32121 are both provided with a straight arm portion 322 and a curved arm portion 323. Correspondingly, the first clamping arm 3211 composed of two first clamping arms 32111 and the second clamping arm 3212 composed of two second clamping arms 32121 also have a straight arm portion 322 and a curved arm portion 323. One end of the curved arm portion 323 is fixedly connected to the straight arm portion 322, and the other end is a clamping end 32125. When limiting the nut rotating column 41, the curved arm portion 323 is arranged around the nut rotating column 41, and the end of the curved arm portion 323 connected to the straight arm portion 322 is located on one side of the nut rotating column 41, and the clamping end 32125 is around the other side of the nut rotating column 41, and the distance between the clamping ends 32125 of the two clamping arms 321 is smaller than the diameter of the nut rotating column 41, which more effectively limits the nut rotating column 41 from moving along its own radial direction.

[0046] The nut rotating wheel 21 is located at a position corresponding to the above-mentioned hinge position 32124. When the clamping arm assembly 32 clamps the nut rotating column 41, the clamping rollers 33 on the two clamping ends 32125 and the nut rotating wheel 21 form a triangular stable structure, which is beneficial for the nut rotating wheel 21 and the two clamping rollers 33 to remain pressed on the nut rotating column 41 during the rotation of the nut rotating column 41.

[0047] In some specific embodiments, reference Figures 1 to 4 The nut rotation driving device 22 includes a nut rotation driving motor, and the nut rotation wheel 21 is arranged on the rotating shaft of the nut rotation driving motor.

[0048] In some specific embodiments, reference Figure 1 The nut rotating device 2 is arranged at one end of the machine base 1, and the other end of the machine base 1 is provided with a machine base holding portion 11.

[0049] In some specific embodiments, reference Figure 1 and Fig.10 The nut 10 connection structure includes at least two nut connecting rods 42 arranged opposite to each other, the upper ends of the nut connecting rods 42 are connected to the bottom of the nut rotating column 41, the lower ends of the nut connecting rods 42 are provided with nut connecting plates 421, and the nut connecting plates 421 are provided with nut connecting holes 4211.

[0050] Before installation, at least two screw holes need to be processed on the nut 10, and the multiple nut connection holes 4211 correspond to the multiple screw holes one by one. The nut connection plate 421 is fixed to the nut 10 by screwing in the screws, that is, the nut rotation column 41 is fixed to the nut 10. The nut connection rod 42 is arranged so that a certain distance is left between the nut rotation column 41 and the nut 10, so that when the nut 10 is installed, it is convenient to observe the installation status of the nut 10 so as to make corrections in time.

[0051] Specifically, an annular connecting plate 43 is provided at the bottom of the nut rotating column 41, and the upper end of the nut connecting rod 42 is fixedly connected to the annular connecting plate 43. A plurality of nut connecting rods 42 are evenly arranged circumferentially around the axis of the annular connecting plate 43. The nut rotating column 41 is connected to the nut connecting rod 42 through the annular connecting plate 43, which is conducive to reducing the outer diameter of the nut rotating column 41, making it more convenient to operate the nut rotating device 2 to drive the nut rotating column 41.

[0052] In some specific embodiments, reference Figure 1 , Figure 8 and Fig. 9 The nut installation device also includes a nut installation auxiliary cylinder 5. The nut rotating column 41 is hollow inside, and the nut installation auxiliary cylinder 5 is inserted into the nut rotating column 41. A rotating bearing 6 is provided between the outer circumferential wall of the nut installation auxiliary cylinder 5 and the inner circumferential wall of the nut rotating column 41, so that the nut rotating column 41 can rotate relative to the nut installation auxiliary cylinder 5; the piston rod of the nut installation auxiliary cylinder 5 faces downward, and the lower end of the piston rod of the nut installation auxiliary cylinder 5 is provided with a supporting portion 51, which can pass through the nut 10 and be supported on the stud 20.

[0053] Specifically, the rotary bearing 6 is mounted on the outer peripheral side of the cylinder body of the nut mounting assisting cylinder 5 .

[0054] During the installation of the nut 10, since the nut 10 is heavy and is subjected to greater gravity, the nut 10 is completely pressed on the stud 20 during the process of screwing the nut 10 onto the stud 20. The friction between the nut 10 and the stud 20 will greatly affect the rotation of the nut 10. Rotating the nut 10 requires greater force, which will increase the difficulty of installation.

[0055] The nut installation auxiliary cylinder 5 in this embodiment is provided. When the nut 10 is installed, the support portion 51 of the piston rod of the nut installation auxiliary cylinder 5 is supported on the stud 20, and the cylinder body of the nut installation auxiliary cylinder 5 is pushed upward. The cylinder body of the nut installation auxiliary cylinder 5 applies an upward pulling force to the nut 10 by rotating the bearing 6 and the nut transmission structure 4. This force does not cause the nut 10 to move upward, but can reduce the pressure applied by the nut 10 to the stud 20, thereby reducing the friction between the nut 10 and the stud 20, making the nut 10 rotate more smoothly, and improving the quality and efficiency of the installation of the nut 10.

[0056] During the installation of the nut 10, as the nut 10 is gradually screwed onto the stud 20, the nut 10 will gradually drop, and the pressure of the cylinder body of the nut installation auxiliary cylinder 5 on the piston rod will also become greater and greater. Therefore, during the installation process, the staff will adjust the air pressure in the cylinder body of the nut installation auxiliary cylinder 5 in real time so that the piston rod can be pushed back by the stud 20 and will not be crushed. At the same time, the pressure of the nut 10 on the stud 20 can also be controlled to be within an appropriate range at different stages of the installation, so that the nut 10 can rotate smoothly.

[0057] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A nut installation device, characterized in that: It comprises a nut rotating device (2) and a nut transmission structure (4); The nut transmission structure (4) comprises a nut rotating column (41), and the nut rotating column (41) is provided with a nut connecting structure (44) for connecting the nut (10); The nut rotating device (2) comprises a machine base (1), a nut rotating driving device (22) and a nut rotating wheel (21); the nut rotating driving device (22) is arranged on the machine base (1); the nut rotating driving device (22) is transmission-connected to the nut rotating wheel (21); the nut rotating wheel (21) is pressed onto the nut rotating column (41); the nut rotating wheel (21) is used to drive the nut rotating column (41) to rotate, thereby driving the nut (10) to rotate.

2. The nut installation device according to claim 1, characterized in that: The machine base (1) is also provided with a limiting device (3), and the limiting device (3) is arranged around the circumference of the nut rotating column (41) to limit the movement of the nut rotating column (41) along its own radial direction.

3. The nut installation device according to claim 2, characterized in that: The limiting device (3) comprises a clamping drive device (31) and a clamping arm assembly (32) which are transmission-connected, and the clamping arm assembly (32) comprises at least two hingedly connected clamping arms (321), and the clamping drive device (31) is used to drive the clamping arm assembly (32) to close or open so as to clamp or loosen the nut rotating column (41).

4. The nut installation device according to claim 3, characterized in that: A clamping roller (33) is rotatably connected to the clamping arm (321); when the clamping arm assembly (32) clamps the nut rotating column (41), the clamping roller (33) is pressed against the outer peripheral wall of the nut rotating column (41).

5. The nut installation device according to claim 3, characterized in that: The clamping arm assembly (32) comprises a first clamping arm (3211) and a second clamping arm (3212); the first clamping arm (3211) is fixedly connected to the machine base (1); two ends of the second clamping arm (3212) are respectively a driving connection end (32123) and a clamping end (32125); a hinge position (32124) is also provided on the second clamping arm (3212); the driving connection end (32123), the hinge position (32124) and the clamping end (32125) are arranged along the extension direction of the second clamping arm (3212); the clamping drive device (31) comprises a clamping drive cylinder; a piston rod of the clamping drive cylinder is connected to the driving connection end (32123); and the first clamping arm (3211) is hinged to the hinge position (32124) of the second clamping arm (3212).

6. The nut installation device according to claim 5, characterized in that: The first clamping arm (3211) includes two first clamping arms (32111) arranged at an interval and a first arm connecting rod (32112) for connecting the two first clamping arms (32111); the second clamping arm (3212) includes two second clamping arms (32121) arranged at an interval and a second arm connecting rod (32122) for connecting the two second clamping arms (32121); the distance w1 between the two first clamping arms (32111) is greater than the distance w2 between the two second clamping arms (32121).

7. The nut installation device according to claim 1, characterized in that: The nut rotation driving device (22) comprises a nut rotation driving motor, and the nut rotation wheel (21) is arranged on the rotating shaft of the nut rotation driving motor.

8. The nut installation device according to claim 1, characterized in that: The nut rotating device (2) is arranged at one end of the machine base (1), and the other end of the machine base (1) is provided with a machine base holding portion (11).

9. The nut installation device according to claim 1, characterized in that: The nut connection structure (44) comprises at least two nut connection rods (42) arranged opposite to each other, the upper ends of the nut connection rods (42) are connected to the bottom of the nut rotating column (41), the lower ends of the nut connection rods (42) are provided with nut connection plates (421), and the nut connection plates (421) are provided with nut connection holes (4211).

10. The nut installation device according to claim 1, characterized in that: It also includes a nut installation auxiliary cylinder (5), the interior of the nut rotating column (41) is hollow, the nut installation auxiliary cylinder (5) is inserted into the nut rotating column (41), and a rotating bearing (6) is provided between the outer peripheral wall of the nut installation auxiliary cylinder (5) and the inner peripheral wall of the nut rotating column (41), so that the nut rotating column (41) can rotate relative to the nut installation auxiliary cylinder (5); the piston rod of the nut installation auxiliary cylinder (5) faces downward, and the lower end of the piston rod of the nut installation auxiliary cylinder (5) is provided with a support portion (51), and the support portion (51) can pass through the nut (10) and be supported on the stud (20).

Images